I hope you manage to eventually obtain an OCAL, they're a very handy tool and can be used on Newts, SCT's and RC's.
It would be great to see an astro test equipment rental business, I'm way too old to be starting businesses again, perhaps some young folks might consider it. It sounds like a business one could run from home, just not sure if the volumes would be sufficient.
Anyway, my RC8 efforts must be coming to fruit, as it's now started to rain here
I just remembered how to zoom the OCAL screen using the mouse, so I've attached a few more snaps showing the secondary mirror donut with OCAL sensor right behind it and cross hairs, which are now aligned on the four mirror spiders. I also changed the colour of the blue marker to yellow for better visibility.